GLTEXCOORDPOINTER(3gl)GLTEXCOORDPOINTER(3gl)NAME
glTexCoordPointer - define an array of texture coordinates
C SPECIFICATION
void glTexCoordPointer( GLint size,
GLenum type,
GLsizei stride,
const GLvoid *pointer )
PARAMETERS
size Specifies the number of coordinates per array element. Must be
1, 2, 3 or 4. The initial value is 4.
type Specifies the data type of each texture coordinate. Symbolic
constants GL_SHORT, GL_INT, GL_FLOAT, or GL_DOUBLE are
accepted. The initial value is GL_FLOAT.
stride Specifies the byte offset between consecutive array elements.
If stride is 0, the array elements are understood to be
tightly packed. The initial value is 0.
pointer Specifies a pointer to the first coordinate of the first ele‐
ment in the array.
DESCRIPTION
glTexCoordPointer specifies the location and data format of an array of
texture coordinates to use when rendering. size specifies the number
of coordinates per element, and must be 1, 2, 3, or 4. type specifies
the data type of each texture coordinate and stride specifies the byte
stride from one array element to the next allowing vertexes and
attributes to be packed into a single array or stored in separate
arrays. (Single-array storage may be more efficient on some implemen‐
tations; see
glInterleavedArrays.) When a texture coordinate array is specified,
size, type, stride, and pointer are saved client-side state.
To enable and disable the texture coordinate array, call glEnable‐
ClientState and glDisableClientState with the argument GL_TEX‐
TURE_COORD_ARRAY. If enabled, the texture coordinate array is used when
glDrawArrays, glDrawElements or
glArrayElement is called.
Use glDrawArrays to construct a sequence of primitives (all of the same
type) from prespecified vertex and vertex attribute arrays. Use glAr‐
rayElement to specify primitives by indexing vertexes and vertex
attributes and glDrawElements to construct a sequence of primitives by
indexing vertexes and vertex attributes.
NOTES
glTexCoordPointer is available only if the GL version is 1.1 or
greater.
The texture coordinate array is initially disabled and it won't be
accessed when
glArrayElement, glDrawElements or glDrawArrays is called.
Execution of glTexCoordPointer is not allowed between the execution of
glBegin and the corresponding execution of glEnd, but an error may or
may not be generated. If no error is generated, the operation is unde‐
fined.
glTexCoordPointer is typically implemented on the client side with no
protocol.
The texture coordinate array parameters are client-side state and are
therefore not saved or restored by glPushAttrib and glPopAttrib. Use
glPushClientAttrib and
glPopClientAttrib instead.
ERRORS
GL_INVALID_VALUE is generated if size is not 1, 2, 3, or 4.
GL_INVALID_ENUM is generated if type is not an accepted value.
GL_INVALID_VALUE is generated if stride is negative.
ASSOCIATED GETS
glIsEnabled with argument GL_TEXTURE_COORD_ARRAY
glGet with argument GL_TEXTURE_COORD_ARRAY_SIZE
glGet with argument GL_TEXTURE_COORD_ARRAY_TYPE
glGetPointerv with argument GL_TEXTURE_COORD_ARRAY_POINTER
SEE ALSO
glArrayElement, glColorPointer, glDrawArrays, glDrawElements,
glEdgeFlagPointer, glEnable, glGetPointerv, glIndexPointer, glNormal‐
Pointer, glPopClientAttrib, glPushClientAttrib, glTexCoord, glVertex‐
Pointer
15 Mar 97 GLTEXCOORDPOINTER(3gl)